Page 2 - Mercury Racing 450R

ADVANCED MIDSECTION
INTEGRATED TIE BAR
POWER STEERING

Each ounce was scrutinized to achieve maximal power with minimal weight.
The Mercury Racing Advanced MidSection (AMS) features heavy-duty guide
plates and stiffened engine mounts to stabilize the outboard for enhanced
high-speed handling.

The AMS also isolates the powerhead from the transom to ensure run quality is
smooth and quiet at all speeds. An optional rear tie-bar bracket integral to the
AMS provides a strong, ultra-light mounting point and uncluttered installation
for catamaran and other high-speed applications. The 450R is offered with a
choice of the 5.44-inch HD gearcase for traditional, submerged applications or,
for boats capable of speeds over 136 km/h, the surface-piercing Sport Master
gearcase with a new one-piece stainless steel propshaft.

SUPERCHARGER
CHARGE-AIR COOLERS
BOOST BYPASS

Mercury Racing applies its supercharging expertise to extract incredible power
from the 4.6-liter V-8. A 2.4-liter twin-screw supercharger delivers pressurized
ambient air to the intake tract for instant throttle response. The supercharger RUGGED MIDSECTION
is water-cooled to reduce the temperature of the intake charge and increase CORROSION PROTECTION
power. A boost bypass valve automatically adjusts maximum boost pressure 3-YEAR WARRANTY
to maintain peak performance in response to changing ambient conditions. A Mercury Racing V-8 outboards are engineered to
custom-designed attenuator is tuned to cancel the harshest high-frequency be reliable and durable. These high-performance
supercharger noise.
outboards are tested, tested and tested again – in
The Mercury Racing 450R is fitted with a special high-capacity oil cooler and an the lab and on the water – in a never-ending quest
exclusive poppet valve in the midsection to provide a higher volume of cooling- to exceed the highest expectations. Run wide open
water flow on-demand. The valve train features a high-performance intake with confidence.
camshaft and race-spec Inconel exhaust valves. Wide-open throttle (WOT)
operating range is extended to 5800-6400 rpm to expand propping options and
maximize performance.